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Conference Paper: Non-linear feedback control of robust bi-color LED lighting

TitleNon-linear feedback control of robust bi-color LED lighting
Authors
KeywordsNon-linear feedback control
Luminous flux
Correlated color temperature (CCT)
Light-emitting diodes (LED)
Issue Date2015
PublisherIEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1002943
Citation
The 2015 IEEE Energy Conversion Congress and Exposition (ECCE), Montreal, QC., 20-24 September 2015. In Conference Proceedings, 2015, p. 3215-3222 How to Cite?
AbstractLight-emitting diode (LED) technology involves highly complex interactions of heat, light, power and color. Dimming a bi-color LED system with color mixing feature will alter the power and junction temperatures, which in turn shift the color spectra of the LEDs. In this paper, a closed-loop control method based on the nonlinear empirical LED model is proposed for decoupling the dimming control and color control of a bi-color system comprising warm-white and cool-white LEDs. The proposed control scheme has been successfully implemented to provide highly precise and independent control of dimming and correlated color temperature (CCT). Even considering significant changes in ambient temperature, the maximum errors in luminous flux and CCT employing the proposed method are around 3% and 1.78% respectively while the corresponding errors using an existing linear duty-cycle control method are 20% and 27.5% respectively.
Persistent Identifierhttp://hdl.handle.net/10722/211511
ISBN

 

DC FieldValueLanguage
dc.contributor.authorLee, ATL-
dc.contributor.authorChen, H-
dc.contributor.authorTan, SC-
dc.contributor.authorHui, SYR-
dc.date.accessioned2015-07-16T02:25:30Z-
dc.date.available2015-07-16T02:25:30Z-
dc.date.issued2015-
dc.identifier.citationThe 2015 IEEE Energy Conversion Congress and Exposition (ECCE), Montreal, QC., 20-24 September 2015. In Conference Proceedings, 2015, p. 3215-3222-
dc.identifier.isbn978-1-4673-7151-3-
dc.identifier.urihttp://hdl.handle.net/10722/211511-
dc.description.abstractLight-emitting diode (LED) technology involves highly complex interactions of heat, light, power and color. Dimming a bi-color LED system with color mixing feature will alter the power and junction temperatures, which in turn shift the color spectra of the LEDs. In this paper, a closed-loop control method based on the nonlinear empirical LED model is proposed for decoupling the dimming control and color control of a bi-color system comprising warm-white and cool-white LEDs. The proposed control scheme has been successfully implemented to provide highly precise and independent control of dimming and correlated color temperature (CCT). Even considering significant changes in ambient temperature, the maximum errors in luminous flux and CCT employing the proposed method are around 3% and 1.78% respectively while the corresponding errors using an existing linear duty-cycle control method are 20% and 27.5% respectively.-
dc.languageeng-
dc.publisherIEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1002943-
dc.relation.ispartofIEEE Energy Conversion Congress and Exposition (ECCE)-
dc.rightsIEEE Energy Conversion Congress and Exposition (ECCE). Copyright © IEEE.-
dc.rights©2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.-
dc.subjectNon-linear feedback control-
dc.subjectLuminous flux-
dc.subjectCorrelated color temperature (CCT)-
dc.subjectLight-emitting diodes (LED)-
dc.titleNon-linear feedback control of robust bi-color LED lighting-
dc.typeConference_Paper-
dc.identifier.emailLee, ATL: tlalee@hku.hk-
dc.identifier.emailChen, H: htchen@eee.hku.hk-
dc.identifier.emailTan, SC: sctan@eee.hku.hk-
dc.identifier.emailHui, SYR: ronhui@eee.hku.hk-
dc.identifier.authorityTan, SC=rp01606-
dc.identifier.authorityHui, SYR=rp01510-
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1109/ECCE.2015.7310112-
dc.identifier.hkuros244389-
dc.identifier.hkuros256488-
dc.identifier.spage3215-
dc.identifier.epage3222-
dc.publisher.placeUnited States-
dc.customcontrol.immutablesml 160104-

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